SHANE Williams will be hoping first impressions do last in the memory of Sir Clive Woodward when he runs out at the Millennium Stadium on Monday in a British Lions jersey.

Williams is one of only three Welshman to figure in the Lions clash against Argentina at the Millennium Stadium on Monday, alongside scrum-half Gareth Cooper and No.8 Michael Owen, who will captain the side.

And the Ospreys flyer is delighted he will be given a chance to impress Sir Clive Woodward and his coaching staff on home soil.

"Starting the game in Wales was what I was aiming for," said Williams.

"It will be an honour playing at the Millennium Stadium in front of your home fans.

"The tour starts here and it is my chance to stake a claim for a Test place.

"We are looking for a convincing performance and a win."

Williams, who has been rooming with England's honorary West Walian Josh Lewsey, admits it is this week that he has begun to realise the magnitude of a Lions tour.

"After this week I am certainly aware of the enormity of the Lions," said Williams.

"I try not to think about of the history because I am nervous enough as it is.

"It is amazing how organised it all is and the goals everyone has for the tour are very focused.

"Clive's aims are particularly sharp and he strikes me a very determined man."

Williams will be hoping Monday will be the launching pad to propel him into the Test selection mix and a possible reunion with All Blacks flyer Joe Rokocoko.

The New Zealand try-machine admitted Williams sidestepping abilities had caused the All Blacks defence trouble in the past after Williams lit up the World Cup fixture between the two sides in 2003.

While accepting Rokocoko's plaudits, Williams is aware what danger the All Blacks flyer will pose for the Lions.

"He is a great player," said the 28-year-old.

"He has what a lot of big wings don't have, tremendous pace and quick feet.

"When you get someone like that running at you, it's more difficult than facing a big lump who just wants to run over you.

"Maybe the fact that I like to use my feet to get past people is why he praised me, but it's flattering.

"Joe and Doug Howlett are arguably the best wings in the world.

"Doug is one of the best players I have played against - Joe Rokocoko as well.

"When you have them both facing you it's quite daunting, but I have enjoyed playing against them in the past.

"I'm hoping to have that chance again."

If Williams does have that opportunity, he realised it could change his life.

"A trip like this can define a career like the 1997 tour to South Africa did for Scott Gibbs," said Williams.

"It's as far as you can go in rugby.

"It's massive and something I never even dreamed of being involved in.

"Everyone remembers the winners on these tours and Tests.

"That was mentioned a lot in the meetings. No-one is going to remember you if we lose this tour."